The Lifelong Museum Learning project is born out of the fact that museums and other non-formal learning environments have a lot to off er in terms of bringing education closer to citizens and in providing learning opportunities for everyone. As part of this project, museums all over Europe set out to review and revise their relationship with society and local communities. They launched signifi cant actions to create social change and integration, as well as to get more people interested in education. Although some museums have started community projects, this shift in focus needs to be supported by supplying the necessary skills and expertise to educational staff at even more institutions. The innovation necessary for opening up to new audiences (adult learners in particular) requires a major commitment to training initiatives by museum educators. The Lifelong Museum Learning project addresses museum educators and cultural mediators in charge of adult education in museums. It is also targeted at institutions willing to develop programmes for adults, to be implemented in museums themselves. The project focuses on designing and delivering training materials to support museum educators in this new challenge. To this end, project activities are based on practices and case studies developed at the European level, and on the expertise and contributions of experienced trainers in the fi eld. Two training courses for museum educational staff were organised in the project’s framework and off ered museum practitioners the opportunity to further develop their skills for working with under-represented segments of the European public. The courses also provided participants the possibility to exchange experiences with colleagues in diff erent countries and institutional frameworks.